glx 4mot- a small leak in the flex connector makes a sound.
on 2004 Volkswagen Passat

tubes, flex-pipe and cat are all together as one integral part. does that mean it is a failure of the the cat system and consequently covered by warranty? VW estimates repair cost $ 1o95.95 and said'no warranty'because the'check engine
light' is not on.

If it is a small hole and the MIL is not on, you are in luck. I would advise you find a muffler shop to give it a quick weld and repair before corrosion get into the system. The VW wouldn't honor my cats (v6 2.8L) saying VW change warranty to 5/50,000. They wanted $1,125 per cat,$ 475 to install each and said don't use aftermarket. Got the cats from Canada for less than $300.00 each, $200.00 to install and saved a bundle.
good luck.